Changes
(----- EPROM -----) (------------------------ Links installed -------------------------)
Type Pins Size A15 A17 A18
27C256 28 32K LK5 (A15=VCC=High) LK4 LK3 (A17=VCC=Supply) N/A 27C512 28 64K LK6 (A15=A15=Address) LK4 LK3 (A17=VCC=Supply) N/A
27C1001 32 128K LK6 (A15=A15=Address) N/A LK1 (A18=VCC=/PGM)
27C2001 32 256K LK6 (A15=A15=Address) LK3 LK4 (A17=A17=Address) LK1 (A18=VCC=/PGM) 27C4001 32 512K LK6 (A15=A15=Address) LK3 LK4 (A17=A17=Address) LK2 (A18=A18=Address)
Some cartridge PCBs don't have any LKs installed, instead, the etched circuit has hardwired connections between some of them. One could scratch them off, and then use the LK soldering points to reconfigure the board for eproms of other size.
